## Feb 18, 2014

### Skip-Counting with Cuisenaire Rods

We used Cusienaire Rods to explore skip-counting.

If you aren't familiar with Cuisenaire Rods, here is a earlier post which gives a brief overview.

After creating this design skip-counting by 2's, 4's and 8's was practiced as well as counting by 1's.

Following the white blocks horizontally across the design it is easy to count from 1 to 16. Following the red blocks, which are 2 cm long, skip-counting by 2's also results in a total of 16. In addition, the purple 4 cm rods, and brown 8 cm rods can be counted across the design for a total of 16.

Next, several more designs were created and used for counting.

Here are some questions we answered for the above design:
How many white cubes are there? - answer 5

The subsequent questions were answered without counting:
How many red rods are there?
How many black rods are there?
How many purple rods are there?

Using the top figure, skip-counting by 3, and 6 was practiced.

This figure was used to count to 14 a few different ways.
3+1+3+3+1+3=14
3+1+3=7 and 7+7=14
7+7=14
3,6,9,12,13,14 - skip-counting green rods, and then white

This figure was use to skip-count by 2's.

To see other ways we have used Cuisenaire Rods, please visit our Math Page or come back next week for estimating.

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